Installing a genuine Sharp Black Inkjet Cartridge (UX-C70B) ensures highly readable, impressive-looking prints from your Sharp UX-B700 fax machine. Youll see a Low Ink or Ink Near Empty message on your UX-B700s display when the current cartridge is running low. Be sure to order a replacement as soon as possible and install it before you see the Out of Ink error, ensuring you dont miss a single fax. This standard yield inkjet cartridge contains enough ink to print 600 pages.